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Microchip Technology DSC1033DE1-018.4320T — Crystals & Oscillators

DSC1033DE1-018.4320T MEMS XO 18.432 MHz CMOS 3.3V -

MPNDSC1033DE1-018.4320T
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Microchip Technology DSC1033DE1-018.4320T, PureSilicon™ MEMS XO, 18.432 MHz, CMOS output, 3.3 V supply, ±50 ppm stability, -20°C to 70°C, standby function, 4-SMD no-lead package, Tape & Reel.

Microchip Technology DSC1033DE1-018.4320T datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

DSC1033DE1-018.4320T specifications
ParameterValue
TypeXO (Standard)
SeriesDSC1033, PureSilicon™
MountingSurface Mount
Supply voltage3.3V
Current - supply3mA (Typ)
Current - supply (Disable)1µA
Frequency18.432 MHz
Frequency stability±50ppm
Operating temperature-20°C~70°C
Size (Dimension)0.098\" L x 0.079\" W (2.50mm x 2.00mm)
Height - seated0.035\" (0.90mm)
OutputCMOS
PackageTape & Reel (TR)
FunctionStandby (Power Down)
Base resonatorMEMS
Case4-SMD, No Lead

Product details

MEMS clock for 18.432 MHz MCU timing

That frequency is a standard baud-rate generator multiple for UART/USART peripherals — common in MCU boards that need 115200 or 921600 baud without fractional-N PLL jitter. Unlike a quartz crystal oscillator, the MEMS base resonator (PureSilicon™ series) is less sensitive to vibration and shock, and the supply chain is not tied to quartz crystal lead times. The 4-SMD no-lead package (2.50 mm × 2.00 mm) fits the same footprint as many quartz oscillators, so a board designed for a quartz XO can often take this part without a layout change.

For a UART clock, ±50 ppm keeps the bit-error rate below 1% at 115200 baud across the full temperature band, assuming the receiver's tolerance is ±2%.

Frequently asked questions

Can DSC1033DE1 replace a quartz oscillator on my board?

Yes, in most cases. The DSC1033DE1 is a MEMS XO with the same 4-SMD no-lead footprint (2.50 mm × 2.00 mm) and 3.3 V supply as many quartz oscillators. The ±50 ppm stability is comparable to standard quartz XOs. The main difference is the MEMS resonator's better shock/vibration tolerance and the absence of quartz supply lead-time risk.

What is the maximum standby current for DSC1033?

The disable (standby) current is 1 µA max. When the standby pin is asserted, the output is disabled and the oscillator core powers down to that level.

Is the DSC1033DE1 RoHS compliant?

The part is listed as RoHS compliant per Microchip's standard product marking. The 4-SMD no-lead package is lead-free compatible.